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NAME

       MP4ConvertFromTrackDuration  -  Convert  a duration from the track time
       scale to a specified time scale.

SYNTAX

       #include <mp4.h>

       u_int64_t MP4ConvertFromTrackDuration(
            MP4FileHandle hFile,
            MP4TrackId trackId,
            MP4Duration duration,
            u_int32_t newTimeScale
       )

ARGUMENTS

       hFile  Specifies the mp4 file to which the operation applies.

       trackId
              Specifies the track from which the duration originates.

       duration
              Specifies the duration that is to be converted.

       newTimeScale
              Specifies the new time scale in ticks per second  to  which  the
              duration should be converted.

RETURN VALUES

       Upon  success, the duration in the new time scale units. Upon error, 0.

DESCRIPTION

       MP4ConvertFromTrackDuration  converts  a  duration  such  as  a  sample
       duration  from  the  track  time scale to another specified time scale.
       This can be used by a player application to map all track samples to  a
       common time scale.

SEE ALSO

       MP4(3) MP4GetSampleDuration(3) MP4ConvertToTrackDuration(3)